Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer can't get a signal from the sensor that tells how fast the back left wheel is spinning.
The vehicle's control module has detected an issue with the electrical circuit of the left rear wheel speed sensor, specifically that the circuit is open or has a fault.
The C065F code is triggered when the control module detects an open circuit or a fault in the 'B' circuit of the left rear wheel speed sensor. This sensor is responsible for providing data on the wheel's speed to the vehicle's control systems, which use this information for functions such as ABS and traction control.
• ABS warning light on
• Traction control light on
• Inoperative ABS or traction control system
• Faulty left rear wheel speed sensor
• Damaged wiring or connectors
• Fault in the ABS control module
ABS: Anti-lock Braking System
OBD-II: On-Board Diagnostics, second generation
• Inspect the left rear wheel speed sensor and its wiring for damage.
• Check the connector for corrosion or loose connections.
• Test the sensor's resistance and signal output with a multimeter.
• Replace the left rear wheel speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ABS control module if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$100 - $300
Moderate
• Chevrolet Malibu
• GMC Sierra
• Buick Enclave
• Regularly inspect wheel speed sensors and wiring.
• Avoid driving in harsh conditions that can damage sensors.
• Perform routine vehicle maintenance checks.
Sensor Issue
• Do not ignore ABS warning lights.
• Have the vehicle inspected by a professional if unsure.
Check with the vehicle manufacturer for warranty coverage on ABS components.
This code has been commonly associated with vehicles experiencing ABS sensor issues, particularly in models with higher mileage.
Moderate – While the vehicle is still drivable, safety features like ABS may not function properly.
Driving with impaired ABS or traction control can increase the risk of accidents, especially in adverse weather conditions.
• Vehicle stationary
• Ignition on, engine off
The left rear wheel speed sensor is located near the wheel hub assembly on the left rear wheel.
Q: What happens if I ignore this code?
A: Ignoring this code may lead to a loss of ABS and traction control functionality, affecting vehicle safety.
Q: Can I drive with this code?
A: Yes, but it's not recommended as safety systems may be compromised.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
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Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
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